Creator unverified · deprecated

x-AI/Grok-4.1-Fast

x-AI/Grok-4.1-Fast is listed with its creator unverified. It accepts text input and produces text output. Reported capabilities include reasoning and tool calling.

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Modalities

Token rates

Unavailable

No recent paired token rate available

Context

Released

2025-11-20

Knowledge cutoff

Unknown

Where to use it

1 observed offerings · token prices in USD per million where available

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Qiniu

x-ai/grok-4.1-fast

deprecated

Input

—

Output

—

Cache

—

Context

Max output

Reasoning: Yes
Tool calling: Yes
Structured output: No
Temperature: Yes

Not a current offering

Limits and capabilities reflect each provider’s listed offering. Unknown means support was not reported.

Provider / API ID	Status	Context	Max output	Input	Output	Cache read	Reasoning	Tools	Structured	Temperature
Qiniu x-ai/grok-4.1-fast	deprecatedNot a current offering	2M	2M	—	—	—	Yes	Yes	No	Yes

Capabilities and limits

Input: text
Output: text
Max output: 2M
Weights: Closed (source-reported)
Release: 2025-11-20
Knowledge cutoff: Unknown
Family: x

Reasoning · Tool calling

Provider-specific limits and support can differ.

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Models to compare

Candidates match reported specifications; they are not tested replacements.

Grok 4.20 Beta ReasoningxAI · 2M contextCompare →Grok 4.20 Multi Agent BetaxAI · 2M contextCompare →

Model and price history

Latest recorded change: source refresh · 2026-10-22

Model changes (2)

source refresh · 2026-10-22

{
  "before": {
    "status": "current"
  },
  "after": {
    "status": "deprecated"
  }
}

source refresh · 2026-09-17

{
  "before": {
    "open_weights": null
  },
  "after": {
    "open_weights": false
  }
}